高空短暫發光現象 (TLEs) 是發生於15到100公里高空的發光現象，為近數十年來新興的研究領域，而福爾摩沙衛星二號所搭載的高空大氣閃電影像儀 (ISUAL) 在2004至2016年任務期間，持續從太空中觀測TLEs並記錄了大量的科學資料，對此研究領域的進展有很大的幫助。然而ISUAL的觀測資料在像差修正與定位精準度檢驗上，尚未有進一步的分析。本研究將以ISUAL星場校正資料，擬合出ISUAL增強影像儀的像差修正多項式，並透過ISUAL TLEs事件與與全球閃電定位系統 (WWLLN) 閃電事件之匹配，嘗試對ISUAL定位精準度進行分析。
本研究中一共有668個淘氣精靈事件與WWLLN閃電事件成為匹配事件對，匹配事件對之間的距離平均值為60.0公里，標準差為62.5公里，距離在80公里以下者有78%，可將此分析結果作為ISUAL的事件定位精準度之參考。此外也針對279個未匹配到WWLLN閃電的淘氣精靈事件進行了討論，結果顯示淘氣精靈事件是否能與WWLLN閃電事件匹配，與其遠紫外光訊號強度及原生閃電種類關聯性不大，推測主要應是受限於WWLLN的閃電偵測率。
經過本研究的修正與分析，未來使用ISUAL所觀測的TLE事件進行科學研究時，像差問題可得到改善，並對ISUAL的定位精準度能有更好的掌握。

The Imager of Sprites and Upper Atmospheric Lightning (ISUAL) on the FORMOSAT-2 is the first scientific payload that can make a long-term global observation of the Transient Luminous Events (TLEs) from space, and have gotten a large amount of TLEs data in 2004-2016. However, the data of ISUAL had a problem with aberration, and the positioning accuracy of ISUAL was also unknown. In this study, the star calibration is used to get the correction polynomial function of aberration, and the positioning accuracy is also analyzed by matching ISUAL TLE events with WWLLN lightning events.
There are 668 elves events matched with the World Wide Lightning Location Network (WWLLN) lightning events in this study. The average distance between these matched events is 60.0 km, and the standard deviation is 62.5 km; 78% of the distances are less than 80 km. The result can be the reference values of the positioning accuracy of ISUAL. For the mismatched elves events, there is an additional discussion of the cause of mismatching. The result shows that the main reason for mismatching may not be associated with the intensity of the far-ultraviolet signal of elves or the type of elves; it is more likely to be related to the detection efficiency of WWLLN.
With the result of this work, the aberration problem of ISUAL can be improved, and the positioning accuracy can be understood furthermore as well.

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